MOTO Technology arms gravel cyclists with more control and durability over harsh terrain, providing a smooth ride quality that helps reduce fatigue. Single-wall rim construction provides excellent compliance and vibration damping. Less fatigue, allows you to ride longer and faster. 27mm wide internal profile for tires from 30mm to 50mm+ ZR1 hubset Lifetime Warranty SRAM Model ID: WH-101-XPLR-A1